Ok here is my problem.
Today i installed (For the first time on this PC) World of Warcraft Wrath of The lich King installed patches to 3.1.3 ( needed for private servers).
I change Realm list for private server i wanted. and tryed to connect and i got this
I tryed to change the server (in realmlist) but get same problem.
I delete everytime Cach and WTH file.
I wan't to play but i don't want to download the latest patch. Becouse i don't know, can i play with it in those private server/s. So who can help me with that problem.